I am looking for information about Factory Tours in the Chicago area. For example, car factory, candy factory, and so on.
Thank-you.

Jelly Bellies (in North Chicago, about 1 hour north of the city) has tours; also the Tribune used to have tours of its printing plant. You might try the Chicago Convention and Vistors Bureau for more ideas.

I can't think of a car factory in Chicago - looks like you'll have to go to the Detroit area for that one.

Eli's Cheesecake Company also does factory tours daily.

Here are some different ideas and links:

Jelly Belly Tour (actually in Wisconsin):
http://www.jellybelly.com/About/Tours/Wisconsin_Tour.htm

Argonne National Laboratory (“The nation's first national laboratory features programs and exhibits on a variety of scientific technologies. A table-top electron accelerator, a video tour of Argonne's Advanced Photon Source and Fuel Conditioning, and remote controlled microscopes are just a few of the learning displays to explore.”):
http://www.anl.gov/OPA/AIC/

Fermi National Accelerator Laboratory:
http://www.fnal.gov/
http://www.fnal.gov/pub/visiting/tours/index.html

US Post Office Factory Tour
433 West Harrison Street, Chicago, (312) 983-7550

McDonalds Museum:
http://www.mcdonalds.com/countries/usa/corporate/info/museum/

John Deere sprayer factory (East Moline, IL):
http://www.deere.com/en_US/ag/servicesupport/jdsprayers/about-us/sprayers-aboutus-sprayerfactory.html

Volo Cars Museum (50 acres in Volo, IL):
http://www.volocars.com/

Chicago Merchantile Exchange:
http://www.cme.com/about_cme/visitors_center/about_visitorscenter_planavisit.cfm

Eli’s Cheesecake Factory:
http://www.elicheesecake.com/indexabout.htm

Long Grove Confectionery:
http://www.longgrove.com/cgi-bin/lg.cgi?A1=tours&cart.en=fbAvJ(,gzM95D;yzk

Chicago Sun-Times Tours:
400 N. Wabash Ave., Chicago, 312-321-3268 (Tue. - Thu.)

Chicago Tribune Printing Tours:
Freedom Center, 777 W. Chicago Ave., Chicago, 312-222-2116 (Tue. - Fri.)

Merchandise Mart:
http://www.mmart.com/

How about a tour of the Tootsie Roll factory? It's Located about 73rd and Cicero Ave, about 1 mile south of Midway airport. Do a search and get the info.